Patents by Inventor Edward Peter Czerwin

Edward Peter Czerwin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process of preparing corrugated paper board with a particular polyvinyl alcohol modified starch-based corrugating adhesive
    Patent number: 4094718
    Abstract: Improved polyvinyl alcohol modified starch-based corrugating adhesive is provided by employing a fine particle size, low cold water solubles containing polyvinyl alcohol that is soluble in warm water, in combination with borax, alkali and water. Corrugated board with lower adhesive add-on and higher line speeds can be produced by the use of the improved polyvinyl alcohol modified starch adhesive. The resulting board has decreased warpage as a result of the lower add-on.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: June 13, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward Peter Czerwin